The un-ionized form of an acid indicator is yellow and its anion is blue. the ka of this indicator is 10â'5. what will be the color of the indicator in a solution of ph 3?

Calculate the potential difference across a 25-Ohm. resistor if a 0.3-A current is flowing through it. V

Which of the subatomic particles have mass, which have a charge and what is the charge, and where do these particles reside in the atom?

A student wanted to investigate whether or not the temperature of the water would affect the solubility of sugar. She had three glasses of water, each with 200mL of water in them. One was at 10 C, the second at 25 C and the third was at 40 C.

Which statement accurately describes a La Niña event? It is the cause of an El Niño event. Its effects are localized, not global. It has the opposite effect of an El Niño event. It is the name for an unusually long El Niño event.

Davahl is interested in tortoises because they can live for over a hundred years and have unique metabolisms. She wants to perform an experiment to see if they can live even longer with a specific nutrient supplement.

Why does Alpha Centauri appear to be yellow-white?

In order to determine speed, you must know

Which of the statements best describes the relationship between the surface of an object and the amount of friction it produces? A.) The smoother the surface of an object, the more friction it will produce. B.

Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm). A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude

Esimate and add to the nearest thousand 6,521+1,063+901